Hmm ja sam svog Samsunga S4 mini rootao i isto mi se knox bunio, da je sistem modificiran. Tako da dobro provjerite da li na novim mobitelima ima Knoxa na Androidu 4.2.2, evo sto pise na XDA za moj 4.2.2:
If you get warnings about applications doing not permitted actions, delete the following files from system/app
KNOXAgent.apk
KNOXStore.apk
ContainerAgent.apk